[Soda ash knowledge] Daily question (23) 2009.10.26
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Please hide the reply. If you do not hide it, you will not be graded in principle. Specific hiding methods: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Edited posts are not graded. (The title of this issue is taken from page 64 of "Technical Worker Job Training Question Bank - Soda Ash Production Operator". The electronic version of the book is available for download in the soda ash information sharing area. http://bbs.hcbbs.com/thread-13140-1-2.html ) Multiple choice question 1. The control range of γ in operation is ( ). A. 1.02～1.12 B. 2.15～2.35 C. 1.5～1.8 2. In order to separate the ammonium chloride in AI from precipitation, MI should be ( ) during production. A. Absorb ammonia B. Cool down C. Add salt 3. ( ) overflows from the cold crystallizer to the salting crystallizer, add salt and take out ammonium chloride. A. AII B. Semi-MII C. MII 4. Reverse material process ( ) to prepare "sparse ammonium". A. Yes B. No C. It depends on the situation. 5. In order to prepare larger particles of ammonium chloride crystals, the residence time in the device is generally required to be greater than ( ). A. 6h B. 7h C. 8h
1.A 2.B 3.B 4.A 5.B
1. The operational control range of γ is (C). A. 1.02～1.12 B. 2.15～2.35 C. 1.5～1.8 2. In order to separate the ammonium chloride in AI from precipitation, MI should be (A) during production. A. Absorb ammonia B. Cool down C. Add salt 3. (B) Overflow from the cold crystallizer to the salting crystallizer, add salt and take out ammonium chloride. A. AII B. Semi-MII C. MII 4. Reverse material process (B) to prepare "sparse ammonium". A. Yes B. No C. It depends on the situation. 5. In order to prepare larger particles of ammonium chloride crystals, the residence time in the device is generally required to be greater than (C). A. 6h B. 7h C. 8h
1.C 2.A 3B 4.B 5.C